pcmci wireless card and laptop battery

So, my girlfriends laptop battery seems to die a little bit quicker with
the wireless card in it. Is this to be expected (it takes up more
resources i assume)

So, what about when I power the laptop down. Would the card still being
in the slot drain the battery still? I turned it off last night and went
to turn it on this morning and the battery was dead. When I turned it
off it was still at about 30% life left, so I am wondering if perhaps
the wireless card still drains power when powered down or perhaps it
didn't shutdown all the way and died at some point. (i don't recall if
it had shutdown fully)

Anyone had any issues with this sort of thing? 

I am going to test it again tonight and see if it was coincidental or
not.

-Robby

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